Yes, for most of the day, for best results, removing them only to eat, drink anything other than water, and brush your teeth. The more consistently you wear them, the more closely your results will track the original treatment timeline discussed at your assessment. Wearing them for noticeably less time each day slows progress and can cause trays to no longer fit properly, since your teeth need consistent pressure to move as planned. This is one of the bigger differences between aligners and fixed braces, which work continuously regardless of how disciplined the patient is about compliance. If you know your schedule makes consistent wear difficult, mention this honestly at your assessment, since it may affect whether aligners are the right fit for you compared to a fixed option.